CCNP Certification / BCMSN Test Tutorial: Getting Started With HSRP
Outlined in RFC 2281, HSRP is often a Cisco-proprietary protocol in which routers are put into an HSRP router group. In addition to dynamic routing protocols and STP, HSRP is considered a significant-availability community assistance, considering the fact that all a few have an Pretty much quick cutover into a secondary path when the principal path is unavailable.
Among the list of routers will likely be selected as the first (“Energetic”, in HSRP terminology), and that Principal will cope with the 토토먹튀 routing whilst another routers are in standby, ready to handle the load if the principal router gets to be unavailable. On this manner, HSRP makes sure a higher network uptime, because it routes IP traffic with no counting on just one router.
The hosts working with HSRP for a gateway don’t know the particular IP or MAC addresses in the routers within the group. They’re communicating having a pseudorouter, a “Digital router” developed because of the HSRP configuration. This virtual router will have a Digital MAC and IP adddress as well.
The standby routers aren’t just going to be sitting down there, although! By configuring multiple HSRP teams on one interface, HSRP load balancing is usually accomplished.
In advance of we reach the more Innovative HSRP configuration, we far better receive a essential 1 started! We’ll be using a two-router topology in this article, and keep in mind that a person or each of these routers could possibly be multilayer switches also. For relieve of examining, I’m going to refer to them only as routers.
R2 and R3 will the two be configured to be in standby team 5. The virtual router can have an IP handle of 172.twelve.23.ten /24. All hosts in VLAN one hundred need to use this handle as their default gateway.
R2(config)#interface ethernet0
R2(config-if)#standby 5 ip 172.12.23.ten
R3(config)#interface ethernet0
R3(config-if)#standby 5 ip 172.twelve.23.10
The present command for HSRP is clearly show standby, and it’s the very first command you must run while configuring and troubleshooting HSRP. Allow’s run it on both of those routers and Evaluate effects.
R2#clearly show standby
Ethernet0 – Team five
Community state is Standby, priority one hundred
Hellotime 3 sec, holdtime 10 sec
Subsequent howdy sent in 0.776
Virtual IP tackle is 172.12.23.10 configured
Active router is 172.12.23.three, priority 100 expires in nine.568
Standby router is area
one state improvements, past point out transform 00:00:22
R3#clearly show standby
Area condition is Energetic, precedence one hundred
Upcoming good day sent in 2.592
Active router is regional
Standby router is 172.twelve.23.2 expires in eight.020
Digital mac handle is 0000.0c07.ac05
two point out variations, very last state transform 00:02:08
We can easily see that R3 has long been chosen because the Lively router (“local point out is Energetic”), the virtual router’s IP is 172.12.23.10, and R2 will be the standby router.
There are several HSRP values that you choose to’ll want to alter occasionally. Let's say we would like R2 to become the Active router in its place? Can we alter the MAC deal with from the virtual router? I’ll response These thoughts in another section of this HSRP tutorial!